export declare function isElevated(): boolean;
export declare function getSystemIncludePath(): Promise<string>;
export declare function downloadFile(url: string): Promise<string>;
export declare function installTestlibFile(content: string, targetPath: string): void;
export declare function installTestlibFileElevated(content: string, targetPath: string): Promise<void>;
export declare function verifyTestlibInstallation(): Promise<void>;
export declare function createBackup(targetPath: string): string;
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